SEER is an authoritative source of information on cancer incidence and survival in the United States. SEER currently collects and publishes cancer incidence and survival data from population-based cancer registries covering approximately 28 percent of the U.S. population.

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HPF:

Standard Populations (Millions) for Age-Adjustment

Standard populations, often referred to as standard millions, are the age distributions used as weights to create age-adjusted statistics. Files containing standard population data for use in statistical software are available below. These contain the same data distributed with the SEER*Stat software. SEER also provides US Population Data which can be used for analyses with SEER*Stat or other software.

Starting with the November 2004 SEER submission of
data (diagnoses through 2002), the SEER Program age-adjusts
using the 2000 US standard population based on single
years of age from the Census
P25-1130 (PDF)1 series estimates of
the 2000 US population. For the 5-year age groups, the
single year of age populations are summarized from the
five single-year of age populations. See 2000
US Standard Population vs. Standard Million for
more discussion.

1 Day, Jennifer Cheeseman, Population Projections of the United States by Age, Sex, Race, and Hispanic Origin: 1995 to 2050, U.S. Bureau of the Census, Current Population Reports, P25-1130, U.S. Government Printing Office, Washington, DC, 1996. (https://www.census.gov/prod/1/pop/p25-1130/p251130.pdf)